Retro Fighters sent me several controllers, including the BattlerGC. The BattlerGC comes with two dongles; one for the Nintendo GameCube and a USB alternative. How well does the controller perform? I’m going to tell you.
I can tell you that the controller really should be used on a GameCube. While I show in my video below, in use on the Nintendo Switch, the GameCube should remain the focus.
The controller is responsive and I noticed no lag. The buttons are not mapped properly on Super Mario 3D All-Stars, which is a shame. Personally, I would use the Defender or a real Pro Controller if you want to play on the Switch. If you are looking for a Nintendo 64 (N64) controller for Nintendo Switch Online (Expansion Pack), you really should check out the Brawler 64 instead.
As for a replacement to an aging Nintendo Wavebird, this is a solid choice. Check the video for more details.